Question

For a particle which can move along x-axis only has initial velocity u=ug i and acceleration is
a=-a, i. If u & a, are positive constants, then number of possible incidents for which the particle is
at a fixed distance L from the starting point may be
(A) one
(B) two
(C) three
(D) four

Answer 1

Explanation:

Initial velocity and acceleration are in opposite directions, so particle stops some where and reverse the direction of motion.

(i) If particle stops before travelling a distance d, then there is only one time the particle will be at distance d from starting point

(ii) If particle stops at distance d, then two values of time.

(iii) If particle stops after a distance d, then three values of time

maybe this is the answer I hope it will help

and sorry if It didn't help